Heel breasting machine



May M, 1935. T. H SEELY ET AL HEEL BREASTING MACHINE Filed July 11, 1932 4 Sheets-Sheet l 114, 1935. T. H. SEELY ET AL 2,000,996

HEEL BREASTING MACHINE- Filed July 11, 1932 4 Sheets-Sheet 2 m Fig. 2

WM x5 y 1935. T. H. sEELY ET AL 2,0@,996

HEEL 'BREASTING MACHINE Filed July 11, 1952 4 Sheets-Sheet 5 May 14, 1935. T. H. SEELY ET AL HEEL BREASTING MACHINE Filed July 11, 1932 4 Sheets-Sheet 4 Patented May 14, 1935 UNITED STATES HEEL BREASTING MACHINE Thomas. H. Seely, Melrose, and Milton H. Ball lard, Beverly, Mass, assignorsto United Shoe Machinery Corporation; Paterson, N. J., a cor-- poration of New Jersey Application July 11, 1932, SerialNo. 621,834

42 Claims.

The. present inventionrelates to machines for breasting heels and is illustrated as embodied in aimachine for breasting heels after they are attached to theirshoes. i

Commercialmaohines for this purpose have usually been provided with a shoe supporting jack which supports the. shoe. at the toe and the heel but applies nosubstantial pressure tothe shank: of the: shoe to bring the inner. surface of the sole materials in the region of the heel breast into contact with the last. .111 such machines the breasting .knife .in making the breasting cut presses downwardly upon the heel with a pressure sufiicienttobringthe inner surface of said sole materials into contact "with the last, and, when vthetbreasting knife has passed through the heel, the reaction, of said sole materials, due to their resiliency, tends to carry them upwardly againstthe knife causing the knife to cutinto them, to a greater or lessextent which, of course, is objectionable. a This tendency is always present in operating upon shoes in which the substance of the hecloffers more resistance to the breasting knife than does the substance of the shank. The .tendency is greatest inshoes which come to the 1 breasting operationmounted on lasts other than the lasts upon which they were initially shaped, such, for exampla as shoes of the McKay; type .which are removed from their lasts prior to the outsole stitching operation and for the purpose of the breasting operation are mounted upon fol-; lowers which usually do not exactly conform to i the contouriof the original last.

One object of the present invention is to overcome the tendency of the shank to spring back against thebreasting knife after the knife has passed through ,theuheel.

To that end, there is provided in'the illustrated machine, in accordance withafeature of the in-- vcntion, a heel post, a heel tread plate, anactua tor, connections from the actuator for imparting upward movement to the heel post, and. connec- If 'the knife is securely held so that it cannot springuaway from its path of movementtheemgagement ofthe chip with thevbeveled surface of theknife tends to tilt the shoe slightly. It has been found that such tilting of .the shoemakes it diiiicult to produce a straight, smooth breasting cut. It is apparent that such a tilting; movement of the shoe would be accompanied byya corre-;- sponding movement of the shoe supporting jack. With this in view,it is an object ofthe present invention to provide means for holding aijack securely'during the operation of a breastingknife in order that the tiltingtendency of the shoe may be substantially controlled if not .entirely elimie natedh 1 l Accordingly, a feature of the inventioncontemplatesthe provision in a heel breasting machine having. a shank stop, a shoe supporting jack, and an elevator for lifting the jack to bring the shoe into engagement with said shank stopv of cooperating clamping surfaces. formed respectively on said elevator and said shoe supporting jack, and means for urging said clamping. sur-, faces toward each other to clamp the jack in adjusted horizontal position. l In the illustrated machine the actuation of the breasting knifeimparts adownward thrust; to the heel end of vtheshoe andto a vertically movable jack upon which the shoe is supported; uItviS proposed to employ the downward. thrust-inns parted to the jack by the breasting knife to as: sist in clamping the jack against horizontal movement. With thisinyiew there is; provided in the illustrated machine, in accordance with a further feature of the invention, a shoe supporting jack, a jack elevator, and :co-operatingclampi-ng surfaces formed on the jack and the elevator, re: spectively, and arranged to receivethe, forceof the cutting thrust of the breasting knife. 1

In commercial heel breasting machines :the shoe supporting jack. is mounted for swinging movement'to carry the shoe. into andsout of breasting position andas a consequence tlievertical angle of the heel breast is aifectedsornewhat by the angular position of the jack during th'e breasting operation, which position is varied-by the length of heel. In machines iniwhich one of the shoe supporting elements is a last pin further variation in the position of the jack is caused by variations in the positions of last pin "holes. While the vertical, angle of the heel breastmay be accurately determined in such machines by adjusting the elevation of the toesupport/this operationcistime consuming and, production would be increased by its elimination. I 1 An object of the present invention is to elimi' nate variations in the angular position of the jack.

In heel breasting machines employing a breasting knife having a constant stroke and a shank stop having a fixed position difficulty has been experienced in bringing the shoe into position to be breasted because of the obstruction of the shank stop to a direct movement of the shoe into such position.

A further object of the present invention is the provision of improved means for bringing a shoe into position to be breasted, or more particularly stated, for bringing a shoe into engagement with a shank stop, which is an intermediate position of the shoe preliminary to the final position of the shoe after the operator has adjusted it upon the jack to bring it into the desired relation to the breasting knife, the final position being hereinafter referred to as the breasting position of the shoe.

With the above objects in view a feature of the invention contemplates the provision in a heel breasting machine having a fixed shank stop, of a shoe supporting jack movable horizontally to bring the heel of the shoe into the plane of the breasting knife, movable vertically to bring the shoe against the shank stop, and maintained vertical throughout all of its shoe positioning movements.

It is an object of the present invention to provide improved means arranged to operate from above and below a shoe to secure the shoe in breasting position. To that end a feature of the invention contemplates the provision in a heel breasting machine having a shank stop, a shoe supporting jack, and an elevator for lifting the jack to bring the shoe into engagement with said shank stop, of manually actuated means, operating simultaneously on the jack and the heel tread, for urging the shoe against the shank stop and pressing the sole materials in the region of the heel breast against the last.

It is desirable that a shoe to be breasted be secured against downward movement after it has been brought into breasting position and to that end a feature of the invention contemplates the provision, in a heel breasting machine, of a shoe supporting jack, a jack elevator, a clutch for holding the elevator against downward movement while permitting upward movement thereof, and means actuated during the retraction of the breasting knife to render the clutch inoperative.

Other features of the invention reside in certain details of construction and arrangement of parts hereinafter described and particularly defined in the claims, the advantages of which will be understood by those skilled in the art from the following description.

In the drawings,

Fig. 1 is a front elevation of a heel breasting machine embodying the several features of the present invention;

Fig. 2 is a side elevation taken from the right of the machine, as seen in Fig. 1;

Fig. 3 is a broken plan view illustrating particularly the parts in the head of the machine;

Fig. 4 is a detail plan view partly in section, illustrating certain parts in the body of the machine;

Fig. 5 is a detail side elevation taken from the right of the machine, as seen in Fig. 1, partly in section, and partly broken away, illustrating on an enlarged scale certain parts indicated generally in Fig. 2 2

Fig. 6 is a detail front elevation, partly in section and partly broken away, illustrating the clutch mechanism and the brake mechanism;

Fig. '7 is a sectional view taken substantially on the line VIIVII of Fig. 6;

Fig. 8 is a perspective view, partly in section, illustrating certain parts shown in Figs. 6 and '7 Fig. 8a is a sectional view taken substantially on the line VIIIa'VIIIa of Fig. 8;

Fig. 9 is a detail view, partly in section and partly broken away, illustrating certain portions of the shoe positioning and clamping devices;

Fig. 10 is a broken perspective View illustrating the heel plate and its supporting bracket;

Fig. 11 is a detail fragmentary view in side elevation illustrating parts of the shoe positioning and clamping mechanism;

Fig. 12 is a sectional View, taken substantially on line XIIXII of Fig. 9;

Fig. 13 is a detail fragmentary view, partly in section illustrating part of the construction shown in Fig. 12;

Fig. 14 is a detail fragmentary View, partly in section illustrating certain parts shown in Fig. 9, looking from the right of said figure;

Fig. 15 is a detail sectional view taken substantially on the line XV-XV of Fig. 5;

Fig. 16 is a detail sectional view, taken through the center of the toe post, as seen in Fig. 2;

Fig. 17 is a detail sectional view, taken substantially on the line XVIIXVII of Fig. 7; and

Fig. 18 is a broken detail view, taken on an enlarged scale, looking at the rear of the shank stop and its supporting member as seen in Fig. 9.

The invention is illustrated as embodied in a machine for breasting heels after they are attached to their shoes. The breasting knife 20 is power actuated through suitable connections from a motor 22. A shoe to be breasted is mounted upon a jack 24 arranged for movement to bring the shoe into engagement with a shank stop 26 mounted at a fixed elevation in the machine frame and arranged to arrest the upward movement of the shoe. Preferably, the shank stop engages the outer surface of the shank at a point near the heel breast. The jack is elevated to bring the shank into engagement with the shank stop by means of an elevator post 28 mounted for vertical movement in the machine frame and arranged to be operated by a spring actuated lever 30 (Fig. 5). The lever 30 applies a relatively light upward pressure to the elevator post 28 whereby the shoe, after it is brought into engagement with the shank stop, may be manually adjusted relatively to the breasting knife to give it the desired breasting position. The organization of the shoe positioning devices is such that the jack 24, as it is moved from its initial position to a position of registration with the elevator post, travels at an elevation such that the heel of the shoe, whatever its height may be, clears the shank stop 26. The shoe is clamped in breasting position by mechanism actuated by a treadle 32 and arranged to impart an additional upward pressure to the elevator post and to impart a downward pressure to a heel tread plate 34. After the shoe has been clamped by the opposing forces of the elevator post and heel tread plate a final upward thrust is imparted to the elevator post 28 by the action of the treadle 32 to bring the shank of the shoe firmly into engagement with the shank stop 26.

Continued depression of the treadle after the shoe has been securely clamped in breasting position trips a one-revolution clutch mechanism.

comprises a clutch ring 49 consisting of two semi thereby connecting the motor 22 with the knife actuating mechanism. During the beginning of the down stroke of the knife, before the knife enters the heel to perform the breasting cut, a clutch roll '36, (Figs. and is released by the knife actuating mechanism and is drawn downwardly between converging surfaces, one of which is formed in a. clutch block 38 and the other of which is the adjacent surface of the elevator post/18. Thus, the clutch roll 36 operates to clamp the elevator post 28 inadjusted position in orderto prevent any depression of .said post under theforce of the cutting thrust of the knife.

Referring now particularly to the actuation of the breasting knife the motor 22 is arranged to impart"continuoustrotation to ally wheel through the pinion 42 arranged to engage gear teethformed on the fly wheel thereby turning the flywheel in: a clockwise direction as seen in Fig. 1. The motor is mounted on a bracket M pivoted toswing about studs 45 in the machine frame in order topermit the motor to be swung toward and from thefly wheel 49. In order to hold the pinion 42 in mesh with the gear teeth .onzthe fly wheel 40 an adjustable link 48 is provided connecting the bracket 44 and the machine frame. The fly wheel 40 is arranged to be connected to the knife actuating mechanism by an expanding ring clutch. such as that disclosed in United'States Letters PatentNo. 1,011,903, granted December 19, 1911 on an application of Arthur Bates. As illustrated, the clutch mechanism circular members hinged at their lower ends and connected at their upper ends by an adjusting means in the form of a right and left threaded screw 50 (Fig. 17). The clutch ring 49 is held against lateral displacement by a diseoidal wheel iii and the breasting knife comprise an eccentric rod 56 (Fig. 6) and an eccentric strap 58 embracing an eccentric drum 60 forming one member of an .integral rotative assembly journaled on av stationary shaft 62 secured to a bracket 6f extending rearwardly from the front of the machine frame, (Fig. 2). The'free end of the eccentricrodis pivotally .mounted upon a shaft jtfiextending forwardly from the knife slide 68 which in turn is mounted for oscillation in guideways ill formed in the upper portion H of the machine frame which is rearwardly oifset, as shown in Fig. 2, in order to provide clearance for thejack mechanism.

In order'to prevent any cramping of thefly wheel against the stationary shaft 62, the fly wheel ismounted to rotate upon a bushing l2 embracing a hub 14 forming an element of the unitary rotative assembly, before referred to (Fig. '7). I

The clutch actuating plunger 54 is actuated by a'compression spring "16 contained within a socket 18 formed in the rotative assembly and arrangedin parallel relation to the stationary shaft 62. The plunger 54is held in inoperative socket .is disposed in parallel relation to the plunger 54. The bearing block 82 is held in position in the socket by a studBB (Fig. 811) formed integrally with the bearing block and extending through a hole formed in the .end wall of the bracket M. The stud 86 is provided with a cotter pin 88 to prevent displacement of the block 82 from its socket. The cam 80 is normally heldlby gravity in engagement within a recessQll formed in the plunger 54, one. edge of thecam 80 engaging the shoulder Q2 forming one end of the recess 90, thereby holding the plunger54xinxinoperative position against the pressure ofthe spring 'lfi. i

In order to disengage the .cam 80 from the plunger 54 and thus topermit the compression spring '16 to actuate the expansion clutch ring, as heretofore described, connections are provided between the treadle 32 and the cam. 80 comprising a bracket 94 (Fig. 6) screwed tothe cam 80 and a latch dog 96 pivoted in the bifurcated end of thebracket 94; said dog having its rotative movement limitedby apin'SB mounted in the bracket: 94 the pin passing through an oversized hole 100 formed in the latch dog. A link m2 engages the latch dog 96 at a predetermined point in the depression of the treadle, and swings the latch dog 96 tothe limit of its clockwise rotation (asseen in Fig. 6), thus causingthe latch dog to be disengaged from a latch block I04 inthe machine frame. Continue'd upward movementofthe link H32 there after lifts the cam 80 from the plunger 54 and permits the spring it to actuate the clutch mechanism. The latch dog 96 is arranged to be engagedby a shoulder Hit formed in the link I02 and has a bifurcated tail Hi8 which embraces the link. 1532 andguides its vertical movement. In order to adjust the shoulder I56 formed in the link I02 relatively tothe latch dog BBan adjusting screw .1 i0 is fitted into" the lower end of the linkifif and mounted for universal hearing within a recess l ii! in the treadle 32. The screw Ill] is held in engagement withthe treadle 32 by means of a spring [it one end of which engages a pin in an arm. I 16 secured to the link I02 and the other end of which is secured to the machine frame. The spring i It is spaced rearwardly from the link Hi2, as shown in Fig; 6, so that it may urge the linkin a clockwisedirection aboutits point of engagement with the treadle 32 in order to hold the link in position to engage the latch dog 96 during theupward movement of the link.

In order that the rotationof the rotative assembly will be arrested at the end of one revolution itis desirable that connections be provided between the actuating mechanism and the'link :02 to disengage the shoulder 1055 from the latch dog 96 and thereby permit the returnof the cam Bil into position to engage the plung'er54. In the illustrative machine such disengagement of the shoulder Hi6 and the latch dog 96 is. ef-

fected bya cam surface 1 it formed in the knife slide $8. and arranged to engage the upperextremity of the link "32 which is curved inwardly for this purpose and passed through an opening H9 formed in the machine frame. The end of the link N12 is held in constant engagement with the knife slide 68 by the spring Hi. In order to ensure the return of the cam 8f! into position to engage the plunger 54 an abutment screw I10 is adjustably mounted in the bracket 94 in position to be engaged by the lower extremity of the knife slide 68 at the limit of its downward movement. In this position of the cam 80 the latch dog 96 is held at the limit of its counterclockwise movement, as seen in Fig. 6, by a latch spring I22 connecting a lug on the latch dog with a lug on the bracket 94. In this position the latching surface of the latch dog 96 engages the under surface of the latch block I04 and holds the cam 86 against upward movement.

In order to actuate the clutch lever 52 with a force sufficient to secure the clutching surfaces against slipping during the cutting thrust of the knife an arcuate cam block I24 is secured to the bracket 64 in position to be engaged by the beveled'end of the plunger 54 in the course of its orbital movement. The position of the cam block I24 relatively to the plunger 54 is such that said plunger will engage the cam block before the breasting knife enters the top lift of the heel. The clutching action of the compression spring I6 is sufiicient to prevent slipping of the clutching surfaces during the idle movement of the knife from the top of its stroke until it reaches the top lift of the heel.

The breasting knife and its actuating mechanism are brought to rest at the end of the breasting operation by a brake shoe I26 (Fig. 8) arranged to engage a concentric brake drum I23 formed (together with the eccentric drum 60, the discoidal member 5|, and the hub 14) as an integral part of the rotative assembly. The brake shoe is arranged to be actuated by the compression spring I6 through the cam 80 which for this purpose is provided with a short arm I38 arranged to engage a brake lever I30. The brake lever is pivotally mounted at I39 in an arcuate groove I34 formed in an extension of the bracket Hand is pivoted at I3I to the brake shoe I26. The braking operation is thus timed to take effeet when the cam 80 is engaged by the shoulder 92 on the plunger 54 and the lever 52 is thus actuated to unclutch the clutch ring 49. In order to adjust the pressure of the brake shoe against the brake drum I28 the brake lever I3!) is arranged to have its pivot I39 alternatively located in a series of holes formed in the bracket 84 and arranged in concentric relation to the axis of the rotative assembly whereby there is provided a limited adjustment of the pivot I3I with relation to the arm I38 of the cam 80. To compensate for the wear of the brake shoe an adjustable abutment screw I36 is carried by the arm I38 and provides the point of contact of the arm I38 with the brake lever I30.

Referring now to the arrangement of the breasting knife 26 in the knife slide 63, it is important that the knife holding mechanism be organized to provide facility in interchanging knives. To that end the illustrative machine is provided with a knife supporting member I46 (Figs. 1 and 3) secured to the knife slide 68 and provided with a groove for the reception of one side edge of the knife blade. The opposite side edge of the breasting knife abuts a grooved wedge I46 clamped to a knife supporting member I44 secured to the knife slide 68. Thus, it is seen that the knife may be positioned within the groove in the member I46 and then swung about the member I46 as a pivot to bring the opposite edge of the breasting knife into position to be engaged by the wedge I46. The wedge block I46 may be slidably mounted on the member I44 and may have its inclined surface arranged to engage a surface I48 of the member I44, which surface converges upwardly relatively to the edge of the breasting knife and consequently, causes the wedge block I46 to travel toward and from the breasting knife as it slides up and down, respectively, upon said surface. The wedge block I46 may be secured in position by a clamping screw I 56. It is apparent that the wedge block I46 may be employed either as a guideway for the breasting knife or as a clamping member for securing the knife in adjusted vertical position. In order to determine the vertical position of the cutting edge of the breasting knife an adjusting screw I52 may be employed, which screw has a flange I54 at its lower end for engagement within a T-shaped notch at the upper end of the breasting knife.

In the illustrated machine the shoe supporting jack 24 is arranged to be maintained upright throughout the jacking operation, (Fig. 2) and is arranged for straight line, horizontal movement in a plane substantially perpendicular to the plane of the breasting knife to bring the heel of the shoe into alinement with said knife. In order to maintain the jack in vertical position a pair of vertical links I56 and I58 are arranged to connect the heel post I66 and the machine frame, said links being pivoted together in order to permit freedom of movement of the jack toward and from the plane of the breasting knife. In order to limit the jack to movement in a plane substantially perpendicular to the plane of the breasting knife a pair of links I62 and I64 are pivoted on horizontal axes in the jack 24 and the machine frame, respectively, and are arranged to connect the base of the jack and the machine frame, said links being pivoted together to permit freedom of movement of the jack toward and from the plane of the breasting knife. It has been learned that the links I62 and I64 tend to bind on their pivots during the movement of the jack toward and from the plane of the breasting knife if no provision is made for permitting a suflicient self adjustment of one of said pivots in its bearing to permit said pivots freely to maintain a constant parallel relation. Accordingly, the pivot I66 of the link I62 is secured in a pivot block I68 journaled at the base of the jack on a horizontal axis at right angles to the pivot I66. through which the pivot I66 passes are made large enough to permit a limited swinging movement of the pivot about the axis of the block I68.

The elevation of the jack is such that as the shoe is moved toward the plane of the breasting knife the top lift of the heel is low enough to clear the under surface of the shank stop 25.

The heel post I60 of the jack is slidably mounted in the link I56 in order to permit a limited elevation of the jack to bring the shank of the shoe into engagement with the shank stop. The heel post I60 may be provided with an adjustable last pin such as that disclosed in United States Letters Patent No. 1,182,074 granted May 9, 1916 on application of Michael F. Brogan. Briefly described, the last pin construction comprises a pin I6I arranged to be slidably mounted in a T,-shaped groove in the segment I 63 which, in turn, is arranged to slide in a T-shaped arcuate groove in the block I65 in order to permit a tilting of the last pin. The block I65 may be arranged for lateral adjustment on the heel post in order to increase the capacity of the last pin for lateral adjustment.

The openings in the jack The toe post 24 is secured to the heel post I60 by means of a bracketI'IU secured to the heel post at I12 and I14 whereby the toe post 24 is held 1 rigid with the heel post I60. At its upper end the toe post-.24 is provided with a toe rest I16 which may be arranged for movement lengthwise of the shoe to adjust the jack for diiferent sizes lustrated toe rest is secured to a stem I18 slidably mounted in a groove formed in a block I86 pivoted on the toe support 24 and said stem is retained in said groove by a guard plate I82 secured to the block I80. In order to prevent any turning movement of the toe rest I16 and the stem I18, the stem is preferably made of square stock. Adjustment ofthe toe rest lengthwise of the toe support iseifected by a hand nut I84 supported upon the block l 80 and arranged to engage screw threads formed on the corners of the stem I16. Adjustment of the toe rest H6 lengthwise of the shoe is effected by turning the block I80 about its pivot in the toe post 24, which movement may be effected by aworm I86 journaled in a boss I88 formed in the toe post 24 and arranged to engage a segmental worm gear I90 formed in the block I80. A hand wheel I92 may be secured to the worm I66 to provide a convenient means for its I manipulation.

Inthe illustrated machine, means is provided for elevating the jack to bring the shoe into position to be operated upon comprising the elevator post 28. (Fig. 5) the upper end of which is slidably mounted in a block I64 supported on lugs inthe machine frame and the lower end of which is slidably mounted in a hole extending throughthe bracket 64. and the stationary shaft 62; i The elevator post also operates to clamp the jack against horizontal movement and to that end the top of the post is arranged to bear against a surface (E96 (Fig. 2) of the heel post I60. when the heel postis brought into registration with the elevator post in the course of the straight line horizontal .movement imparted to the jack to bring the heel of the shoe into alinee ment with the breasting knife. If desirable, the topiof the elevator post and the surface I 5360f the heel post may be serrated or otherwise treated to increase the frictional engagement of said the' illustrative machine this adjustment is effected by pivoting the jack supporting link I58between adjustable pivot screws I99 and 20! conically pointedat their ends and arranged to be seated in pivot blocks 2ll3and20", respectively, arranged. to be clamped within bracketsformed onthe' machine frame. The pivot screws I99 and 2M may conveniently be secured in adjusted position by split clamps formed in the link I58. The elevator post is actuated bya pair of springs I96. (Figs. 2 and 4) arranged to actuate the bell crank lever. pivoted on theshaft I91, said springs beingattachedto a cross pin in the bell cranklever-and at their opposite ends to a cross pin mounted in a plate I98. The plate I98 may be arranged for adjustment to vary the tension of thesprings I96.-As illustrated, the plate I98 has threaded engagement with an adjusting screw 200. supported in the machine frame, and is held against rotation by engagement of its wings 202 withribs 204 formed in the machine frame. The bell. crank lever. 30 is arranged to exert an upward pressure against the lower end'of the B1B! vator post28. I

In order to maintainthe elevator postat the limit of its downward movement until the jack 2% has been brought into position to be engaged by the elevator post a latching 'mechanism is provided for holding the bell crank lever 30 at the limit of its counterclockwise movement, as seen in Fig. 5, and latch tripping mechanism. is provided which mechanism is preferably actuated bythe jack24 as it comes into alinement with the elevator post. In the illustrative machine the latch mechanism comprises a cylindricallatch block 266 secured in horizontal position in the lower end of a swinging link 2 I 2 and a latch block fimi secured to the bell crank lever 30 and arranged to engage a shoulder 2Ifl formed in the block 206. The link 2I2 is pivoted at its upper end inthe pivot block 205 and at its lowerv end in a stud 213. projecting outwardly from the machine frame. At the point where the cylindrical latch block 206 projects inwardly from the link 2 than opening 2 I 5 (Fig. 2) is formed in the frame to provide clearancefor the block 206 during the-swinging movement of the link 2l2 hereinafter described. The latch tripping mechanism comprises the swinging link 2I2 above referred to and. an arm 2I4 freely mounted on a pin 2H5 projecting upwardly from the top of the swinging link .2 I 2 and having alatch pin 2| 8 projecting. upwardly therefrom into position to be engaged by abeveledextension of the pivot pin l66 asthe jack comes into alinement with the elevator post 28 (Fig. 4). The engagementof the pivot pin I 66 with the latch pin 2I8 displaces the arm 214 which is heldfrom swinging in the directionof movement of the jack by engagement of a lug2l9 (Fig. 5) extending downwardly therefrom with an extension ofthe pivot pin.226 which connects the link I64 to themachine frame. The displacement of the arm2 I4 by the pivot pin I66 swings the link 212, disengaging the latch blocks 2G6 and 2298, thereby releasing the bell crank lever 36 andpermitting the elevation of the post28 by the springs I96. After the tripping operation the swinging link 2I2 is returned to its initial position by the spring 220, one end of which engages a pin 222 extending downwardly from the arm 2H1 and the other end of which is secured to the machine frame. The spring 220 also op-. erates to hold the arm 2 I4 yieldingly in a predetermined position, which position is determined by the engagement of the depending lug US with the extensionof the pivot pin 226 (Fig. 2.). As the jack is moved out of alinement with the elevator post .28 after a breasting operation the extension of the pin I66 engages the latch pin 2 i8 swinging the arm 2 I4 idly about its pivot- 2I6 without changing the position of the link 2| 2. In order to permit adjustment of the latch pin 2I8 relatively to the beveled extension of the pivot pin I66 the pivot pin 216 (Fig. 5) may be-eccentrically mounted in a cylindrical block228. adjustably secured at the upper end of the link 212 by a split clamp 230. The-bellcrank lever 3ll-is,re-. turned to its initial or latched position in the course of the breasting operation by a roll 232 pivoted on a lug 234 extending downwardly from the eccentric strap 58 and arranged to engage the bell crank lever 36 near its forward end. In order to insure the return of the bell crank lever to latching position by the roll 232 the bell crank lever has an extension 235 formed thereon in the path of movement of the roll 232 across the surface of the bell crank lever (Fig. 4) thereby increasing the duration of the engagement of the bell crank lever by said roll. As the bell crank lever 36 is returned to its latching position the block 266 engages the block 266 swinging the link 2l2 against the tension of the spring 226. After the block 268 has passed below the shoulder 216 formed in the block 206 said spring 220 operates to return the swinging link 2|2 to its normal position and thereby to return the latch blocks 26-6 and 268 to latching relation. The normal position of the swinging link 2 I 2 and consequently the relative latching position of the latch blocks 266 and 268 is determined by the engagement of the abutment screw 236 with the abutment 238 formed in the machine frame and this position may be varied by changing the position of said screw.

In the illustrated machine the elevation of the shoe during the breasting operation is determined by a fitted shank stop 26 mounted at'a fixed elevation in the machine frame and arranged to arrest the upward movement of the shoe (Figs. 9 and 11). It is desirable that the shank stop be adjustable longitudinally of the shoe in order that it may always be located adjacent to the heel breast, regardless of the length of heel to be perated upon, and accordingly, the shank stop is, mounted in a carrier or block 246 arranged to slide on a horizontal stud 242 secured in a bracket on the machine frame. The block 246 may conveniently be adjusted by a hand nut 244 arranged to engage the threaded end of the stud 242 and provided with a flange 246 for engagement with a complemental groove formed in the block 246. In order to prevent rotation of the shank stop 26 about the stud 242 a stud 241 (Fig. 1') is mounted in the machine frame in parallel relation to the stud 242 and arranged for slidingengagement with the block 240.

It is desirable that the shank stop 26 be arrangedto fit the shoe shank in order that the pressure of the shoe against the shank stop shall bear against a suff cient extent of surface to prevent undue marking of the shoe. Accordingly, a series of fitted shank stops may be provided in order to adapt the machine to operate upon shoes having varying transverse curvatures at the shank. In order that the shank stops may be readily interchangeable they are arranged to be easily and quickly assembled in the block 246 and removed therefrom for the substitution of another shank stop. To that end, the illustrated shank stop is provided with a stem 248 arranged for engagement within a socket formed on the block 240, and a handle 256 is provided on the shank stop 26 for the convenience of the operator in assembling and removing the shank stop. The position of the shank stop 26 transversely of the shoe is determined by a pin 252 mounted in the stem 268 (Figs. 9 and 18) and arranged to engage an annular'slot 254 formed in the block 246; The pin 252 travels to and from the slot 254 through an internal groove 255 extending lengthwise of the block 240. In order to hold the shank stop 26 in adjusted rotative position while permitting self adjustment to varying inclinations of shanks, a plunger 256 is mounted in the socket formed in the block 246 and is pressed against the end of the stem 248 by a compression spring 258 wound around the stem of the plunger 256 and confined between the head of the plunger and the bottom of the socket. The end of the plunger stem is passed through a hole in the block 240 and is provided with a cotter pin 266 to prevent displacement of the plunger when there is no shank stop mounted in the block 240.

The shoe is gaged relatively to the breasting knife 26 by the heel tread plate 34 which is ar ranged to be engaged by the tread of the heel as the shoe is elevated to bring it into position to be breasted (Fig. 11). Preferably the forward edge of the heel tread plate has the same curvature as the breasting knife in order to permit the heel tread plate to be positioned adjacent to the path of the rear surface of the breasting knife. As the inclination of the shoe on the jack is varied to alter the breasting angle, the inclination of the heel tread is varied accordingly and consequently the heel tread plate is required to assume varying inclinations. In order to render the heel tread plate self adjusting to varying inclinations of heel treads, it may be pivotally mounted in a supporting bracket 262. The heel tread plate is normally positioned as shown in Fig. 2 with its forward end bearing against the under surface of the supporting bracket 262. As the heel of a shoe to be breasted comes into engagement with the heel tread plate, the plate swings about its axis into a position such as that indicated in Fig. 11 with its lower surface adjacent to the upper surface of the heel tread. As has been stated, it is desirable that the forward edge of the heel plate conform to the curvature of the breasting knife and, consequently, when a knife of one curvature is removed for the substitution of a knife of a different curvature, it is desirable that the heel tread plate also be exchanged for a heel tread plate having a like curvature. Accordingly, the illustrated heel tread plate is arranged to be readily assembled in the bracket 262 and readily removed therefrom. To that end the plate is provided with a pivot pin 266 which is arranged to be inserted into a socket formed in the bracket 262 (Fig. The pivot pin is secured to the plate, for example, by rivets 264, and may have its under surface adjacent the plate slabbed off in order to provide an extended surface for engagement therewith. The pivot pin 266 is retained within the bracket 262 by a stop 2'") pivoted at the end of the bracket 262 and arranged to engage the reduced end of the pin 266. In order to position the heel tread plate with its forward edge in alinement with the breasting knife a shoulder 266 is formed in the bracket 262 for engagement with the edge of the plate and the plate is held in engagement with the shoulder 268 by the stop 210. The operative position of the stop 21!] may be determined by a stop pin 212 secured in a boss 214 formed in the bracket 262. The socket in the bracket 262 within which the pin 266 is received is preferably extended to the end of said bracket in the form of a groove which forms an abutment to take the force of the clamping thrust exerted upon the heel plate. The bracket 262 is secured to a post 216 which is mounted for vertical movement in the machine frame. In order to hold the bracket from swinging a guide post 218 (see Fig. 11) is mounted in the machine frame for engagement with the bifurcated end of an arm of the jack co-operates with the springs 28fl projecting rearwardly with an upwardinclination from thehub of the bracket 262; In order to counterbalance the greater part of the weight of the post 216 and the parts mounted thereon while permitting the hub of the bracket 262 to come to rest upon the machine frame, a compression spring 282 is wound about the post 216' and arranged to engage the machine frame at its lower extremity and at its upper extremity to engage acollar 234 secured to the post 216, which collar may be adjustable on the post 216 toixvaryrthepressure of the spring-282. It will be seen that the spring 282 during the elevation I96 whichactuate the bell crank lever 30, reducing the amount of work required of the springs 96, thus permitting the use of smaller springs I96 than otherwise would "be required and reducing thezstrain on the bel1 crank lever 30.

a Inv accordance with the invention the illustrated machine: wcomprises clamping mechanism for clampingtheshoe between the heel post liiii, whichis pressed upwardly from below the shoe, and the heel tread plate 36 which is drawn downwardly from above the shoe simultaneously with the :upward movement of the heel post. Preferably, the'force of the clamping action is sufiicient to bring the sole materials in the region of the heel, breast into contact with the last. This clamping action is effected by an actuator in the form of a lever 286 which exerts adownward thruston the heel plate post 278 and an upward thrust von the elevator post '28. The connection between the lever 286 and the heel plate post comprisesa link 288' pivotedin the bifurcated end of the heelplate postand having its opposite end pivoted in the bifurcated end of the lever 286. The connectionbetween the=lever 286 and the elevator post 28 comprises a pair of pawls 388 (Fig. 14) mounted within a pawl carrier 3 I 6 which isslidably mounted upon the elevator post 28 and journaled in the hub 289 of the lever 286.

lever 2861s inactive it is supported between its privotal connection with the link 288 and an extension 290 of the machine frame. The lever 286 preferably actuated through yielding connections from the treadle 32, said connections comprising a link 292 pivoted tola lever 29! carried by the lever 286anda yielding link 2% having a universal connection at its lower end with the treadle 32. The yielding link 296 (Figs. 1 and 2) consists in a pivot block 29 forming an element of the universal connection with the treadle 32, a stern 29B freely mounted for vertical movement insaid block, a compression spring 302 wound aboutthe stem and confinedbetween the adjustable nuttil i and the upper end of the block 299. The stem 296 is confined in the block 299 by a retaining nut 3% arranged to engage the under surface of the block 299, and at its upperend is secured by a split clamp 298 to the link 292. The depression of the treadleactuates the lever 294 which operates, first, to release the pawls 308 forengagement with the ratchet teeth D formed in the elevator post 28, and finally,by engagemerit of "the abutment screw SlZ-(Fig. 9) with thecross bar 3M formed in the lever 2%, actuates said lever to" impart simultaneously? an upward thrust to the elevator post 28'and a downward pull to the post 276. In acting on the elevator post 28 the lever 288 operates as alever of the second class, swinging about its fulcrum withthe link 288 and in acting on the post 2'l6uthe lever 286 operates as a lever of the first class, l'ulcruming on the pawl carrier 3 l6.

In the illustrated machine the pivotal connection of the lever 286 with the pawl carrier 316 is midway between the pivotal connection of said lever with the link 288 and the pivotal connection of the lever 294 with thelink 292. It, therefore, follows that the force exerted upon the. elevator post 28 bythe movement of the lever 286 about its pivotal connection with the link 238 is double the forceexerted by the treadle 32 on the lever 294; and the force exertedon the heel plate post 216 against the top lift of the heel is equalto the pressure exerted by the treadle uponthe lever 294. It will be seen, therefore, that the upward pressure exerted'on the heelpost is double the downward pressure exerted on the heel tread plate and, consequently, the thrust of the treadle, in addition to effecting the clamping action above referred to, will operate to pressthe shoe upwardly into firm engagement with the shank stop.

As has been stated, the connection between the lever 286 and the elevator post 26 consists in the pair of pawls 308 freely mounted in the pawl carrier 3H3 arranged to slide upon the elevatorpost. The pawls 308 (Fig. 14) are mounted in horizontal holes 3! 8 at opposite sides of the pawl car-# rier tit and are held against rotation, while permitted to slide within said holes, by guiding screws 320 which engage grooves 322' formed in said pawls. The pawls are provided Withdetents 32 5 which are arcuate in horizontal section and are positioned at elevations which vary approximately half the distance between successive ratchet teeth 3H), thereby reducing the distance between successive positions of the pawl carrier 3H6 upon the elevator post 28. The pawls 308 are normally held in ratchet engaging position by bell cranklevers 326 (Fig; 13) pivoted upon lugs 328 extending outwardly from opposite sides of the lever 285 and arranged to support said bell crank levers 3213 at an inclination to the horizontal. The levers 326 engage within grooves 330 formed in the pawls 308 and are actuated by a spring 332 to hold the pawls in ratchetengaging position. When the machine is at rest the bell crank levers 326 are acted upon by an arm 334 :of the lever 29 3 to hold the pawls out of engagement with the ratchet teeth 3H) and to that end the arm 334 is provided with an adjustable abutment screw 336 arranged for engagement with the arms 338 of the bell crank levers 326, which arms extend inwardly into position to be engaged simultaneously and with a uniform action by the abutment screw 336. The lever actue ating movement of the arm 33d is limited by the engagement of the outer end of the lever 294 with the end of the lever 236 which, in turn, is supported upon the extension 296 of the machine frame (Fig. 9) In order to provide clearance-for the bell crank levers 325 the pawl carrier 3H6 has recesses Mil formed at each end thereof for the reception of said levers.

In certain classes of work, particularly in breasting heels to which a rubber tread has been attached, it is desirable that the pressure of the heel plate against the surface of the heel be relatively light. Inthe illustrative machine this resultis effected by the provision ofthe-nut BM (Fig. 5) which forms anadiustable abutment for the upper end of the spring 302. Said nut may be provided with a series of radial sockets projecting inwardly from its periphery for the reception of an operating tool. A set screw 342 may be provided to secure the nut 304 in adjusted position.

In the illustrated machine the elevator post 28 is secured against downward movement by a clutch mechanism arranged to be rendered operative at the beginning of the down stroke of the breasting knife thereby preventing displacement of the shoe during the cutting thrust of the knife. As illustrated, this clutch mechanism consists of a clutch roll 36 (Figs. 5 and positioned between downwardly converging surfaces, one of which is formed in the clutch block 38 and the other of which is the adjacent surface of the elevator post 28 upon which surface the clutch roll operates. The clutch block 38 is secured in a recess 344 formed in the under surface of the block I94. The clutch roll 36 is urged downwardly between said converging clutching surfaces by a pair of springs 346 attached at opposite ends of a cross pin 348 (Fig. 15) upon which the clutch roll 36 is pivoted, and attached at their opposite ends to pins 350 .(Fig. 5) secured to plates 352 projecting downwardly from the block I94 and secured to the fiat surfaces of a semi-annular boss 354 extending downwardly from the block I94 and arranged to embrace the post 28. At the end of a cycle of operations the clutch roll 36 may be unclutched to release the elevator post 28 and permit it to return to its lower position. In the illustrative machine the unclutching of the roll 36 is effected,

as the knife returns to its upper limit, by the shaft 66 which has a roll engaging flange 355 at its inner end and is provided with a lateral groove 356 to provide clearance for the clutch block 38. The shaft 66 may be adjusted relatively to the clutch roll 36 by the adjusting screw 358 having a circular head arranged for sliding engagement in an arcuate groove formed at the outer end of the shaft 66. The engagement of the head of the adjusting screw within said arcuate groove also operates to prevent rotation of the shaft 66 and thus to maintain the flange 355 and the groove 356 in their proper relation to the clutch roll 36 and the clutch block 38, respectively.

The operation of the machine is as follows: A shoe to be breasted is mounted upon the jack and the jack is adjusted to position the shoe for the desired angle of breasting cut. The jack 24 is then moved rearwardly of the machine by the operator, as indicated by the arrow in Fig. 5, until the heel post comes into vertical alinement with the elevator post 28 when the beveled extension of the pivot pin I66 engages the latch pin 2 I 8 displacing the arm 2 I4 and thereby swinging the link 2I2 and disengaging the latch blocks 206 and 208. Thereupon the bell crank lever 30 is actuated by the springs I96 to lift the elevator post 28 and thereby elevate the jack 24. At an early stage in the elevation of the jack the heel tread engages the heel tread plate 34 and continued elevation of the jack thereafter carries the heel tread plate, together with its supporting post 216, into the position illustrated in Fig. 11. The elevation of the jack 24 is limited by the engagement of the shank of the shoe with the shank stop 26. The jack comes to rest with the shoe held in position by a pressure sufiiciently light to permit manipulation of the shoe by the operator to bring the front edge of the top lift into the desired relation to the front edge of the heel tread plate 34 for the breasting operation. The treadle is then depressed, thus swinging the lever 294 clockwise, as illustrated in Fig. 9, and permitting the bell crank levers 326 to be actuated by the spring 332 to bring the pawls 308 into engagement with the ratchet teeth 3 I 0 formed in the elevator post 28. Continued depression of the treadle actuates the lever 286, thereby imparting a downward pull to the heel plate post 216 and an upward thrust to the elevator post 28, clamping the heel plate against the heel tread and bringing the shank of the shoe firmly into engagement with the shank stop 26. The depression of the treadle also imparts an upward movement to the link I02 of the clutch tripping mechanism. During the early part of the depression of the treadle, while the shoe is being clamped into position, a measured amount of lost motion is imparted to said link I02 to bring the shoulder I06 into engagement with the latch dog 96. Continued depression of the treadle thereafter swings the latch dog 96 out of engagement with the latch block I04 and swings the cam 80 out of alinement with the plunger 54, permitting the compression spring 16 to actuate said plunger thereby expanding the clutch ring 49 connecting the motor 22 and the rotative assembly. During the early part of the down stroke of the knife before the knife enters the heel to perform the breasting cut the cam block I24 engages the beveled end of the plunger 54, positively actuating the clutch lever 52 and further expanding the clutch ring 49. Also during the early part of the down stroke of the knife, the flange 355 of the shaft 66 disengages the clutch roll 36 whereupon said roll is actuated by the springs 346 to clutch the elevator post 28 and hold it securely against displacement by the cutting thrust of the knife. Continued rotation of the rotative assembly thereafter drives the breasting knife through the heel of the shoe and at the end of the breasting cut brings the roll 232 into engagement with the bell crank lever 30, returning said lever to latched position. Also, during the cutting stroke of the knife the link I02 is actuated by the cam surface II8 formed in the knife slide 68 to disengage the shoulder I06 from the latch dog 96 and permit the cam 80 to return to its operative position. If the friction of the parts overcomes the tendency of gravity to return the cam 80 to its operative position the knife slide 68, as it approaches the lower limit of its stroke, engages the abutment screw I secured in the bracket 94 and positively returns the cam 80 to its operative position and returns the latch dog 96 into its position of engagement with the latch block I04.

As the rotative assembly completes one rotation the plunger 54 engages the cam surface of the cam 80 and the cam is thereby actuated to retract the plunger 54 and to apply the brake shoe I26 thereby bringing the rotative assembly to rest with the breasting knife at the top of its stroke and the clutch roll 36 displaced from clutching position.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a heel breasting machine having a shank stop which is maintained at a fixed elevation, the combination of a breasting knife for operating upon a heel attached to a shoe on its last, a shoe supporting jack, and a jack lifting and sustaining means, said jack being movable into escapes and out of position to be engaged was jack lifting and sustair'iingmeans.

2. A heel breasting machinefhavingjin combination, a breastingknife for'op'erating upon a heel attached to a shoe on its last,a shoe supporting jack, ashank stop having a fixedelevation, a heel tread plate, manually actuated means for applying upwardpressure to the jack and simultaneously applyingdownward pressure to the heel tread plate in orderto press the plate against the heelof the shoe and to urge the shoe against the plate and the shank stop.

3. A heel breasting machine having, in combination,a breasting knifefor operating, upon a heel attached to a shoe on its last, a shoe supporting jack, means for elevating the jack, a vertically movable heel plate positioned tobe engaged by the heel during theelevation of the jack, and manually actuated means for simultaneously imparting anupward pressure to said jack elevating means and a downward pressure to the heel, plate in order to bring the inner surface of the sole materials in the region of the heel breast intocontact with the last.

4. A heelb'reasting machine having,'in combination, a breasting knife for'operating upon a heel attached to a shoe, a shank stop, a shoe supporting jack, means for elevating the jack to bring the shoe into engagement with said shank stop, a vertically movable heel plate positioned to be engaged by the heel during the elevation of the jack, and manually-actuated means arranged to press the shoe upwardly against the shank stop and to urge the heel plate downwardbination,=a knife forjbreasting a heel attached to a shoe, a shank stop; an elevator for bringing the shoe into engagement with said shank stop, a shoe supporting jack arranged to be moved into and out of position to be acted upon by said elevator, latching mechanismfor retaining said elevator, at the lower limit of its movement, and operative connections between said latching mechanism, and said jack.

'7. A heelbreasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, shoeholding means comprising a shank stop, means for pressing the shoe upwardly into rigid engagement with the shank stop, and means for applying a downward pressure upon the heel of the shoe in predetermined ratio to the upward pressure.

8. A heel b'reasting machine having, in combination, a breastihg knife for operating upon a heel attached to a shoe, shoe holding means comprising a (fitted shank stop, means for pressing the shoefupwardly into rigid engagement with the shanklstop, andmeans for applying a downward'pressu're upon the heel of the shoe in predetermined ratio to the upward pressure.

9. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached toa shoe, shoe holding means comprising a shank stop mounted ata predetermined elevation, a heel post, a heel tread plate, an actuator, connections from the actuator for impartmg upward movement to the heel post, and connections from the actuator for simultaneously imparting downward movement to the heel tread plate in order to clamp the shoe therebetween.

10. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached toa shoe, shoe holding means comprising a shank stop mounted at a predetermined elevation, a heel post, a heel tread plate, an actuator for simultaneously imparting upward movement to the heel post and downward movement to the heel tread plate, and breakable connections between the actuator and the heel post.

'11. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, shoe holding means comprising a shank stop mounted at a predetermined elevation, a heel post, a heel tread plate, an actuator for simultaneously imparting upward movement to the heel post and downward movement to the heel tread plate, means normally connecting the actuator to the heel post, and means for disengaging the actuator from the heel post.

12. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, shoe holding means comprising a shank stop mounted at a predetermined elevation, a heel post, a heel tread plate, an actuator for simultaneously imparting upward movement to the heel post and downward movement to the heel tread plate, means normally connecting the actuator to the heel post, a treadle, and means operable by the retraction of the treadle for disengaging the actuator from the heel post.

13. A heel breasting machine having, in com.- bination, a breasting knife for operating upon a heel attached to a shoe, shoe holding means comprising a shank stop mounted at a predetermined elevation, a heel post arranged for vertical movement, a heel treadplate, a treadle, and connections between said treadle and'said heel post and heel tread plate arranged to clamp the shoe between the heel post and heel tread plate and then to urge said heel post upwardly to bring the shoe firmly into engagement with said shank stop.

14. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, a shank stop mounted at a fixed elevation, a heel post, a heel tread plate;

an elevator for imparting upward movement to said heel post, a treadle, a member actuated thereby, connections between said treadle actuated member and elevator and connections between said treadle actuated member and heel tread plate whereby the depression of the treadle operates to clamp the shoe between the heel post and heel tread plate: and to press the shoe firmly into engagement with the shank stop.

15. A heel breasting machine having, in combination, a breasting knife for operating upon a.

heel attached to a shoe, a shank stop mounted at a fixed elevation, a heel post, a heeltread plate, a treadle, a treadle-actuated lever, connections between said lever and the heel post for imparting an upward movement thereto, and connections between said lever and the heel tread plate for imparting a downward movement to the plate.

16; A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, a shank stop mounted at a fixed elevation, a heel post, a heel tread plate, a treadle, a treadle-actuated lever, connections between said lever and the heel post for imparting an upward movement thereto, connections between said lever and the heel tread plate for imparting a downward movement to the plate, and means for actuating said lever to press the shank of the shoe upwardly against the shank stop.

17. In a heel breasting machine having a shank stop, a shoe supporting jack, and an elevator for lifting the jack to bring the shoe intoengagement with said shank stop, the combination of co-operating clamping surfaces formed on said elevator and said shoe supporting jack, and means for urging said clamping surfaces toward each other to clamp the jack in adjusted horizontal position.

18. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, a shoe supporting jack arranged for vertical movement and for movement toward and from the plane of the breasting knife, a jack elevator arranged substantially in alinement with said breasting knife, and means actuated by the cutting thrust of the breasting knife for clamping said jack in adjusted horizontal position comprising co-operating clamping surfaces formed on said jack and said elevator and arranged to receive the force of the cutting thrust of the breasting knife.

19. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, a shank stop, a shoe supporting jack arranged for movement in a horizontal plane to bring the shoe into alinement with said shank stop, a jack elevator post in substantial alinement with said breasting knife, means for holding said elevator post against downward movement, and co-operating clamping surfaces formed at the base of said jack and at the top of said elevator post respectively for holding said jack against horizontal movement.

20. A heel breasting machine having, in combination, a breasting knife for operating upon a heel attached to a shoe, a shoe supporting jack arranged for vertical movement and arranged for horizontal movement to bring the shoe into alignment with the breasting knife, means actuatedby the breasting knife for clamping the jack against horizontal movement comprising a clamping surface formed at the base of the jack, and a cooperating clamping surface positioned substantially in alinement with the breasting knife, said clamping surfaces being arranged to receive the force of the cutting thrust of the breasting knife.

21. In a heel breasting machine, a breasting knife, a fixed shank stop, a shoe supporting jack movable horizontally to bring the heel of the shoe into the plane of the knife and movable vertically to bring the shoe against the shank stop, and means for maintaining the jack vertical throughout all of its shoe positioning movements.

22,. In a heel breasting machine, a fixed shank stop, and a shoe supporting jack arranged for horizontal movement to bring the shoe into alinement with said shank stop and arranged for vertical movement to bring the shoe into engagement with said shank stop in advance of the breasting operation.

23. A heel breasting machine having, in combination, a cutter for operating upon a heel attached to a shoe, means for actuating said cutter in a direction perpendicular to its cutting edge, a fixed shank stop, and a shoe supporting jack arranged for straight line movement in a given direction to bring the shoe into alinement with said shank stop and arranged for straight line movement in another direction to bring the shoe into engagement with said shank stop.

24. A heel breasting machine having, in combination, a cutter for operating upon a heel attached to a shoe, means for actuating said cutter in a direction perpendicular to its cutting edge, a shank stop, a shoe supporting jack arranged for movement in a vertical plane substantially perpendicular to the plane of the breasting knife to bring the shoe into engagement with said shank stop, and means for maintaining said jack constantly upright.

25. A heel breasting machine having, in combination, a breasting knife for operatingupon a.

heel attached to a shoe, a fixed shank stop, a shoe supporting jack arranged for horizontal movement in a path substantially perpendicular to the plane of the breasting knife and arranged for vertical movement in advance of the breasting operation to bring the shoe into engagement with said shank stop.

26. A heel breasting machine having, in combination, a cutter for operating upon a heel attached to a shoe, a shank stop, a shoe supporting jack, linkage between the jack and the frame arranged to prevent swinging movement of the jack about vertical axes while permitting movement of .the jack relatively to the machine, and linkage between the jack and the frame arranged to prevent swinging movement of the jack about horizontal axes while permitting movement of the jack relatively to the machine.

27. A heel breasting machine having, in combination, a cutter for operating upon a heel attached to a shoe, a shank stop, shoe supporting means comprising a heel post, heel post supporting means arranged to permit both horizontal and vertical movement of the heel post while preventing swinging movement of the heel post about horizontal axes, a toe post secured to said heel post, and linkage between the toe post and the machine frame arranged to limit the movement of the jack to a predetermined'vertical plane.

28. A heel breasting machine having, in combination, a cutter for operating upon a heel attached to a shoe, a shank stop, a shoe supporting jack, and a jack supporting member upon which the jack is slidably mounted, which member is held against swinging movement about horizontal axes while permitted to move relatively to the machine frame.

29. A heel breasting machine, having, in combination, a cutter for operating upon a heel attached to a shoe, a shank stop, a shoe supporting jack, an elevator for lifting the jack to bring the shoe into engagement with said shank stop, and manually actuated means, operating simultane ously on the jack and the heel tread, for clamping the shoe in breasting position.

30. A heel breasting machine having, in combination, a knife for breasting a heel attached to a shoe, a shank stop, a shoe supporting jack, an elevator for elevating said jack to bring the shoe into engagement with said shank stop, means for applying a relatively light upward pressure to said elevator, an actuator for applying a relatively heavy upward pressure to said elevator in order to bring the shoe firmly into engagement with said shoe positioning means, a treadle, and,

locking means operable by the depression of the treadle to connect the actuator to the elevator.

31. A heel breasting machine having, in combination, a knife for breasting a heel attachedto a shoe, a shank stop, a shoe supporting jack, yieldingly actuated jack elevating means for bringing the shoe into engagement with said shank stop, a clutch for retaining the jack elevating means in elevated position, and means operable during the retraction of the knife to render the clutch inoperative.

32. A heel breasting machine having, in combination, a knife for breasting a heel attached to a shoe, a shank stop, an elevator for bringing the shoe into engagement with said shank stop, a shoe supporting jack arranged to be moved into and out of position to be acted upon by said elevator, yielding means for actuating said elevator, latching mechanism for retaining said elevator at the lower limit of its movement, operative connections between said latching mechanism and said jack, a treadle, and connections from the treadle for applying a clamping pressure to said elevator to secure the shoe in breasting position.

33. In a heel breasting machine, a breasting knife, a shoe supporting jack, a jack elevator, a clutch for holding the elevator against downward movement while permitting upward movement thereof, and means actuated during the retraction of the breasting knife to render said clutch inoperative.

34. A heel breasting machine having, in combination, a cutter for breasting a heel attached to a shoe, cutter actuating means, a shoe supporting jack, a jack elevator, a clutch for holding the elevator against downward movement comprising downwardly converging clutching surfaces, a clutch roll positioned therebetween, yielding means for urging said clutch roll downwardly, and means actuated by the cutter actuating means during the retracting stroke of the cutter to disengage said clutch roll from said clutching surfaces.

35. A heel breasting machine having, in combination, a knife for breasting a heel attached to a shoe, a shank stop, a shoe supporting jack, an elevator for lifting said jack to bring the shoe into engagement with said shank stop, a treadle, connections between the treadle and the elevator, yielding means whereby said elevator is normally held at its limit of elevation, latching means whereby said elevator is retained at its lower limit, knife actuating mechanism, and con nections between said mechanism and said elevator for returning the elevator into position to be retained by said latching means.

36. A heel breasting machine having, in combination, a knife for breasting a heel attached to a shoe, a shank stop, a shoe supporting jack, anelevator for lifting said jack to bring the shoe into engagement with said shank stop, yielding means whereby said elevator is normally held at its limit of elevation, latching means whereby said elevator is retained at its lower limit, knife actuating mechanism including an eccentric member, and connections between said eccentric member and said elevator for returning the elevator into position to be retained by said latching means.

37 A heel breasting machine having, in combination, a knife for breasting a heel attached to a shoe, a shoe supporting jack, an elevator for lifting said jack to bring the shoe into position to be operated upon, a yieldingly actuated elevator lever, latching mechanism for retaining said lever in a position such that the elevator is positioned at its lower limit, knife actuating means, and connections between said actuating means and said elevator lever whereby said elevator lever is returned to latched position.

38. In a power heel breasting machine, a breasting knife, a knife slide, a clutch, and an unclutching member positioned in the path of the knife slide whereby the return of said member from inoperative position to operative position is ensured.

39. In a power heel breasting machine a breasting knife, connections between the breasting knife and a source of power, a clutch, an unclutching member, a brake, and operative connections between said unclutching member and said brake.

40. In a power heel breasting machine, a breasting knife, connections between the breasting knife.

and a source of power, a clutch, an unclutching member, a brake, and operative connections between said unclutching member and said brake including a brake lever pivoted on an adjustable fulcrum.

41. A heel breasting machine having, in combination, a breasting knife, actuating means therefor including a knife supporting bracket, a knife adjusting screw mounted in said bracket, in terlocking connections between said knife and said adjusting screw, and means for clamping said knife to said bracket comprising a grooved member for receiving one side of the knife blade, and a vertically movable wedge member for engaging the opposite side of said knife.

42. A heel breasting machine having, in combination, a breasting knife, actuating means therefor including an oscillating bracket, a knife adjusting screw arranged for interlocking engagement with said knife, means for securing said knife to said bracket comprising a grooved abutment arranged to receive one side of said knife, and a grooved wedge arranged to engage the opposite side of said knife.

THOMAS H. SEELY. MILTON H. BALLARD. 

